Since this is a new engine Slimline may not have updated their website yet. My best guess would be to give Slimline a call and talk to them about it. I'm sure they have the specs on the new engine and can help get you hooked up with the proper pitts exhaust system. Here's their contact info:
Contact Information
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Phone: 480-967-5053
Fax: 480-967-5030
e-mail:
[email protected]
Slimline Products
PO Box 3295
Scottsdale, AZ 85271
Hope this helps
Ken